Physics-
General
Easy
Question
Atom bomb consists of two pieces of 
and a source of
Proton
- Neutron
- Meson
- Electron
Proton
The correct answer is: Neutron
The sun is continuously emitting light and heat at a very high rate. The source of the huge solar energy is the fusion of lighter nuclei. About 90 % of the mass is composed of hydrogen and helium and rest 10% contains other elements. The temperature of interior of sun is very high. Continuous fusion of hydrogen nuclei into helium nucleus is taking place, which result in the liberation of huge amount of energy.
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What fraction of a radioactive material will get disintegrated in a period of two half-lives
What fraction of a radioactive material will get disintegrated in a period of two half-lives
physics-General
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The minimum energy required to excite a hydrogen atom from its ground state is
The minimum energy required to excite a hydrogen atom from its ground state is
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The electric potential between a proton and an electron is given by 
, where 
is a constant. Assuming Bohr’s model to be applicable, write variation of 
with n,n being the principal quantum number
The electric potential between a proton and an electron is given by , where is a constant. Assuming Bohr’s model to be applicable, write variation of with n,n being the principal quantum number
physics-General
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A beam of fast moving alpha particles were directed towards a thin film of gold. The parts 
and 
of the transmitted and reflected beams corresponding to the incident parts 
and 
of the beam, are shown in the adjoining diagram. The number of alpha particles in
A beam of fast moving alpha particles were directed towards a thin film of gold. The parts and of the transmitted and reflected beams corresponding to the incident parts and of the beam, are shown in the adjoining diagram. The number of alpha particles in
physics-General
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If the binding energy of the deutriumis 
. The mass defect given in 
is
If the binding energy of the deutriumis . The mass defect given in is
physics-General
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If in hydrogen atom, radius of 
Bohr orbit is , frequency of revolution of electron in orbit is 
, choose the correct option
If in hydrogen atom, radius of Bohr orbit is , frequency of revolution of electron in orbit is , choose the correct option
physics-General
physics-
The following diagram indicates the energy levels of a certain atom when the system moves from 
level to 
, emitting a photon of wavelength 
. The wavelength of photon produced during its transition from 
level to is
The following diagram indicates the energy levels of a certain atom when the system moves from level to , emitting a photon of wavelength . The wavelength of photon produced during its transition from level to is
physics-General
physics-
The curve between the activity 
of a radioactive sample and the number of active atoms 
is
The curve between the activity of a radioactive sample and the number of active atoms is
physics-General
physics-
The following diagram indicates the energy levels of a certain atom when the system moves from 
level to . A photon of wavelength 
is emitted. The wavelength of photon produced during it’s transition from 
level to is 
. The ratio 
will be
The following diagram indicates the energy levels of a certain atom when the system moves from level to . A photon of wavelength is emitted. The wavelength of photon produced during it’s transition from level to is . The ratio will be
physics-General
physics-
The count rate for 10g of radioactive material was measured at different times and this has been shown in figure with scale given. The half-life of the material and the total count in the first half value period, respectively are
The count rate for 10g of radioactive material was measured at different times and this has been shown in figure with scale given. The half-life of the material and the total count in the first half value period, respectively are
physics-General
physics-
The diagram shows the path of four 
-particles of the same energy being scattered by the nucleus of an atom simultaneously. Which of these are/is not physically possible
The diagram shows the path of four -particles of the same energy being scattered by the nucleus of an atom simultaneously. Which of these are/is not physically possible
physics-General
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The diagram shows the energy levels for an electron in a certain atom. Which transition shown represents the emission of a photon with the most energy
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The figure shows a graph between 
and 
, where 
is the area enclosed by the 
th orbit in a hydrogen like atom. The correct curve is
The figure shows a graph between and , where is the area enclosed by the th orbit in a hydrogen like atom. The correct curve is
physics-General
physics-
Assume the graph of specific binding energy 
mass number is as shown in the figure. Using this graph, select the correct choice from the following.
Assume the graph of specific binding energy mass number is as shown in the figure. Using this graph, select the correct choice from the following.
physics-General
chemistry-
Compare x and y bond length in above molecules:
Compare x and y bond length in above molecules:
chemistry-General
